单项选择题

有以下程序段,其输出的结果是( )。
int x, y, z;
x = y = z = O;
++x | | ++y && ++z;
cout<<x<<","<<y<<","<<z<<end1;

A.1,1,1
B.1,1,0
C.1,0,0
D.0,0,0